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Mathematics
Mathematics
Problem
Two sectors each subtend an angle of
90
∘
90^{\circ}
9
0
∘
at the centre of their respective circles. The radii of the circles are 6 cm and 9 cm. What is the ratio of their areas? a)
9
:
4
9 : 4
9
:
4
b)
4
:
9
4 : 9
4
:
9
c)
8
:
27
8 : 27
8
:
27
d)
2
:
3
2 : 3
2
:
3
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